package com.example.yls.demoa;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    private ListView stuListView;
    private ArrayList<Student> studentArrayList = new ArrayList<>();
    private ArrayList<Student> searchResultList = new ArrayList<>();
    private StuAdapter adapter;
    private Button btnAddStu;

    private EditText edtKeyword;
    private Button btnsearch;

    private boolean isResultList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initStuArrayList();

        initAdapter();

        initListView();

        initAddBtn();

        initSearchView();
    }
//初始化搜索模块
    private void initSearchView() {
        edtKeyword = findViewById(R.id.edt_keyword);
        btnsearch = findViewById(R.id.btn_search);

        btnsearch.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String keyword = edtKeyword.getText().toString().trim();
                //使用学生列表和关键字，得到搜索结果列表
                search(studentArrayList,keyword);
                adapter.changeData(searchResultList);
                isResultList = true;
            }
        });
        edtKeyword.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void afterTextChanged(Editable editable) {
                String keyword = edtKeyword.getText().toString().trim();
                //使用学生列表和关键字，得到搜索结果列表
                search(studentArrayList,keyword);
                adapter.changeData(searchResultList);
                isResultList = true;
            }
        });
    }
    //使用学生列表和关键字，得到搜索结果列表
    private void search(ArrayList<Student> studentArrayList,
                        String keyword){
        searchResultList.clear();
        for(int i=0;i<studentArrayList.size();i++){
            Student s = studentArrayList.get(i);

            //如果学生姓名包含了关键字 这个学生就加入到结果列表
            if(s.getName().contains(keyword)){
                searchResultList.add(s);
            }
            //如果学生年龄等于关键字 这个学生就加入到结果列表
            else if(String.valueOf(s.getAge()).equals(keyword)){
                searchResultList.add(s);
            }
        }

    }
    //初始化添加学生按钮
    private void initAddBtn() {
        btnAddStu = findViewById(R.id.btn_addStu);
        btnAddStu.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent();
                intent.setClass(MainActivity.this,
                        AddActivity.class);
                startActivityForResult(intent, 1001);
            }
        });
    }

    //初始化ListView
    private void initListView() {
        stuListView = findViewById(R.id.lv_stu);

        stuListView.setAdapter(adapter);

        stuListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                Student s = studentArrayList.get(i);
                if(isResultList){
                    s = searchResultList.get(i);
                }
                Toast.makeText(MainActivity.this,
                        "姓名"+s.getName() + " 年龄"
                                +  s.getAge(),
                        Toast.LENGTH_SHORT)
                        .show();
                Intent intent = new Intent();
                intent.setClass(MainActivity.this,
                        EditActivity.class);
                intent.putExtra("NAME",s.getName());
                intent.putExtra("AGE",s.getAge());
                intent.putExtra("IMGID",s.getImgId());
                intent.putExtra("NO",s.getNo());
                startActivityForResult(intent,1002);
            }
        });
    }

    //初始化适配器
    private void initAdapter() {
        adapter = new StuAdapter(MainActivity.this, studentArrayList);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        Log.e("MainActivity",
                "requestCode = " + requestCode + " resultCode = " + resultCode);

        if(data == null){
            return;
        }
        if(resultCode == 2001){
            String name = data.getStringExtra("NAME");
            int age = data.getIntExtra("AGE", 0);
            int imgId = data.getIntExtra("IMG", R.drawable.dog1);

            Student s = new Student("10006",name, age, imgId);
            studentArrayList.add(s);
            adapter.notifyDataSetChanged();
        }
        else if(resultCode == 3001){
            String name = data.getStringExtra("NAME");
            int age = data.getIntExtra("AGE", 0);
            int imgId = data.getIntExtra("IMG", R.drawable.dog1);
            String no = data.getStringExtra("NO");

            for(int i=0;i<studentArrayList.size();i++){
                Student s = studentArrayList.get(i);

                if(s.getNo().equals(no)){
                    s.setName(name);
                    s.setAge(age);
                    s.setImgId(imgId);
                }
            }
            String keyword = edtKeyword.getText().toString().trim();
            //使用学生列表和关键字，得到搜索结果列表
            search(studentArrayList,keyword);
            adapter.changeData(searchResultList);
            isResultList = true;
        }
    }

    /**
     * 初始化学生列表的数据
     */
    private void initStuArrayList() {
        Student s1 = new Student("10001","张一", 18, R.drawable.dog1);
        Student s2 = new Student("10002","张二", 19, R.drawable.dog2);
        Student s3 = new Student("10003","张三", 20, R.drawable.dog3);
        Student s4 = new Student("10004","张四", 21, R.drawable.dog4);
        Student s5 = new Student("10005","张五", 22, R.drawable.dog5);

        studentArrayList.add(s1);
        studentArrayList.add(s2);
        studentArrayList.add(s3);
        studentArrayList.add(s4);
        studentArrayList.add(s5);

    }
}
